Find the middle of both cast ons and create two separation loops (sorry the cord is clear, I wasn’t thinking about photos when I chose my favorite needles!)

Joining in the round is a bit different, there is a whole other sock in the way! So I always use the “just start and clean up sts with the tail” approach.

Ignoring sock #2 for now, straighten up sock #1’s sts and prepare to knit the first half of round. (in this case sock #2 is your active loop so you don’t have to create one!)

Ready to knit, not twisted:

First half of sock 1 knit!

Continuing to ignore sock #2 turn your work, move sts so you can work them, create an active loop and continue.

getting ready to work the rest of round 1 on sock 1:

First round of sock #1 is complete. Now, ignoring sock #1 we focus on sock #2.:

straighten out the sts:

We already have an active loop (sock #1 is sitting on it) so go ahead and work the first half of sock 2

nearly there:

When you get to the end, turn your work, move sts and create an active loop to work the 2nd half of sock #2

You are now back at the beginning of round.

Some tips:

1. Join the socks together via safety pin or locking st marker. It is easier to work them when they aren’t moving apart.

2. When you finish working a round on a sock leave the yarn end behind the needle. It is easier to pick it up to work the next round from this position

yarn placed behind the needle, socks are locked together with a st marker (I later move to a safety pin)

The beginning of round (BOR)
S#1 on left, S#2 on right. I’ve finished knitting the cuffs at this point. I usually make this decision just before finishing the cuffs.

First option (just keep going as you are) (Sorry this picture is kind of backward. Imagine you are looking at it from the BOR)

Option 2 (how I do it). I add an extra half round to S#1 so that both fronts and both backs are on the same side of the needle. I find it easier to keep track, especially if you are working a patterned sock.

Continuing on:

As you move you’ll find your safety pin isn’t keeping the socks together and they are moving apart more:

You’ll have to move it occasionally to keep them from accidentally losing a loop.